Convertible easel



FIG. 1 is a perspective view of a convertible easel showing my new design;

FIG. 2 is a left end elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a perspective view in a different position of use; and,

FIG. 6 is a front elevational view on a reduced scale of FIG. 5. 

The ornamental design for a convertible easel, as shown and described. 